Wave Connector: Remove taxes while send invoices

functions.php

<?php
/**
 * Remove Taxes from order 
 *
 * @param array $variables get variables.
 * @param int $order_id get order id.
 * @return array
 */
function wave_order_variable( $variables, $order_id ) {
    $items = array();
    foreach( $variables['input']['items'] as $item ) {
        $item['taxes'] = array();
        $items[] = $item;
    }
    $variables['input']['items'] = $items;
    return $variables;
}
add_filter( 'venus_wc_export_invoice_variables', 'wave_order_variable', 10, 2 );